Merge branch 'release/0.8.1'
Merge branch 'develop'
ReduceOperations.hyperLogLog
Adding insert shortcut, for adding literal values to the tuple stream.
make hyperLogLogMap public with configurable serializer
fix unit test
Added implicits for row*Mat, Mat*col, vec+vec, vec-vec, vec hProd vec and col * row (outer product)
Added implicits for row*Mat, Mat*col, vec+vec, vec-vec, vec hProd vec and col * row (outer product)
Changed vectorOuterProduct to use filterOutZeros
switching to two parameters instead of a single tuple2 param
Fixed rename issue in outerproduct, added tests
Merge pull request #247 from mcfunley/develop

Adding insert shortcut, for adding literal values to the tuple stream.
Merge pull request #249 from ccsevers/vector_implicits

FIx for issue 248
Add better error messaging when FlowDef is null.
Merge branch 'develop' of https://github.com/twitter/scalding into hll-aggregate
minor tweaks from oscar
Merge pull request #254 from azymnis/argyris/null_flowdef

Add better error messaging when FlowDef is null.
Removed type paramater from RichPipe's using method and added it to to nested foreach method, which is only place where it appears to be used
Factored out handling of Context objects into new class SideEffectBaseOpertion. Added support for using Context to GroupBuilder, with mapStream the only currently supported method
SideEffectBaseOperation should be abstract